Note 20 - Changes in Major Plan Assets and Benefit Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Changes In Plan Assets And Benefit Recognized In Other Comprehensive Income Loss [Line Items]
Newly established gain (loss)		$ (14)	$ (5)
Amortization of:
Prior service credit	[1]	(8)	(8)
Net actuarial loss	[1]	(4)	(4)
Curtailment gain recognized in expense	[1]	2	1
U.S. [Member]
Changes In Plan Assets And Benefit Recognized In Other Comprehensive Income Loss [Line Items]
Newly established gain (loss)		16	6
Amortization of:
Prior service credit		(7)	(7)
Net actuarial loss			5
Curtailment gain recognized in expense		(2)
Total income (loss) recognized in Other comprehensive income		7	4
Non-US [Member]
Changes In Plan Assets And Benefit Recognized In Other Comprehensive Income Loss [Line Items]
Newly established gain (loss)		(30)	(21)
Amortization of:
Net actuarial loss		5	5
Total income (loss) recognized in Other comprehensive income		$ (25)	$ (16)

[1] Reclassified to Pension income - refer to Note 20, "Retirement Plans" and Note 21, "Other Postretirement Benefits" for additional information.